Dry coil grinding chamber
By installing dust removal components and guide plates in the dry-type transformer coil grinding chamber, an air curtain and filter plates are formed to separate dust, solving the dust pollution problem, realizing closed control and efficient collection of dust, and ensuring the health of operators and the cleanliness of the production environment.
Patent Information
- Application Number
- CN202522182080.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-15
AI Technical Summary
During the grinding process of dry-type transformer coils, the generated epoxy dust is fine, easily suspended, and difficult to degrade, leading to workshop pollution and health risks, and increasing cleaning and maintenance costs.
A dry-type transformer coil grinding chamber is designed, which uses a dust removal component to form an air curtain at the feed inlet. Combined with filter plates and guide plates, it achieves preliminary separation and collection of dust. An air circulation filtration system is constructed using a fan and air duct. Combined with a bend to adjust the airflow direction, it forms precise dust control.
It effectively isolates dust diffusion, improves workshop cleanliness, reduces cleaning and maintenance costs, enhances dust control precision and efficiency, extends filter life, and reduces labor intensity and safety hazards.
Smart Images
Figure CN224934605U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer manufacturing technology, specifically to a dry transformer coil grinding chamber. Background Technology
[0002] In the manufacturing process of dry-type transformers, the coils after epoxy resin casting need to undergo curing, demolding, and finishing processes. Due to the characteristics of the casting process, the outer surface of the coils often has defects such as burrs, flash, uneven resin flow, air bubbles, pits, or local protrusions. These surface defects not only affect the appearance of the product, but more importantly, they may cause electric field concentration and aggravate partial discharge. In severe cases, they may reduce insulation strength and threaten the long-term reliability of the transformer. Therefore, before coil assembly, the surface needs to be finely polished to make it smooth and flat. At present, the polishing of dry-type transformer coils is mostly done manually in open workshops or simple workstations by hand-held angle grinders, sandpaper, or pneumatic polishing tools. However, the polishing process generates a large amount of epoxy dust. This dust is fine, easily suspended, difficult to degrade, and has a certain degree of irritation. Open operations cause dust to permeate the entire workshop, contaminating other processes, affecting the overall cleanliness, and increasing cleaning and maintenance costs.
[0003] Therefore, existing technologies need further development. Utility Model Content
[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a dry-type transformer coil grinding chamber to solve the technical problems in the related technology that a large amount of epoxy dust is generated during the grinding process. This dust is fine, easily suspended, difficult to degrade, and has a certain degree of irritation. Open operation causes dust to permeate the entire workshop, pollute other processes, affect the overall cleanliness and the health of workers, and increase cleaning and maintenance costs.
[0005] To achieve the above technical objectives, the present invention adopts the following technical solution: a dry-type transformer coil grinding chamber is provided, comprising: a grinding space and a feed inlet communicating with the grinding space; a dust removal assembly having a filter section and an air outlet section, the filter section being connected to the air outlet section, the air outlet section extending along a preset direction, and the air outlet section being disposed at the feed inlet of the grinding space; the air outlet section is used to generate airflow toward the interior of the grinding space to form an air curtain to prevent dust from escaping from the feed inlet.
[0006] Furthermore, the dust removal assembly includes: a filter element disposed within the grinding space; an air inlet duct installed within the grinding space and connected to the filter element for filtering dust through the filter element; a fan disposed on the air inlet duct and connected to the air inlet duct; and an air outlet duct extending in a predetermined direction and connected to the air outlet end of the fan; wherein the fan and the air outlet duct form an air outlet section; and the filter element and the air inlet duct form a filtration section.
[0007] Furthermore, the dust removal component also includes a bend, one end of which is located at the air outlet of the air duct, and the other end of which is positioned towards the grinding space.
[0008] Furthermore, it also includes: a filter plate, which is disposed in the grinding space and located below the dust removal assembly; the two sides of the filter plate are respectively connected to the opposite side walls of the grinding space.
[0009] Furthermore, it also includes: a guide plate, which is inclined and located below the filter plate to guide dust to slide down.
[0010] Furthermore, it also includes: a fixing plate, which is installed at the feed inlet of the grinding space and connected to the side of the filter plate near the feed inlet; the fixing plate is also connected to the side of the guide plate near the feed inlet to fix the filter plate and the guide plate.
[0011] Furthermore, it also includes: a cleaning port, which is located at the connection between the guide plate and the bottom of the grinding space; a cleaning door is provided at the cleaning port, which is rotatably set relative to the grinding space.
[0012] Furthermore, it also includes an air blowing pipe that passes through the grinding space. The air outlet of the air blowing pipe is located above the end of the guide plate near the fixed plate, so as to blow the dust on the guide plate to the cleaning port by external high-pressure gas.
[0013] Furthermore, it also includes a wind baffle, which is installed at the feed inlet and spaced apart from the bend.
[0014] Furthermore, it also includes two feed rails and a connecting plate. The two feed rails are spaced apart along the width of the grinding space and are connected by the connecting plate.
[0015] Beneficial effects: 1. By installing the exhaust section of the dust removal component at the feed inlet of the grinding space, a continuously flowing air curtain is created. This air curtain effectively blocks dust particles that attempt to escape from the feed inlet during the grinding process and blows them back into the grinding space, thus physically isolating the main channel for dust diffusion. This solution fundamentally solves the workshop pollution problem caused by open grinding, provides health protection for operators, and maintains the cleanliness of the external production environment.
[0016] 2. By installing a bend at the end of the air outlet duct, the direction of the final airflow can be flexibly adjusted. This allows operators to precisely guide the air curtain to the area where dust needs to be blocked, based on the specific location of the grinding operation and the dust dispersion situation. For example, it can be directly aimed at the center area of the coil being operated or the feed inlet. This solution enhances the targeting and effectiveness of the air curtain and further optimizes the accuracy and efficiency of dust control.
[0017] 3. By installing a filter plate below the dust collection assembly, the grinding space is vertically divided into different functional areas. The filter plate allows airflow to pass through so that the dust collection system in the upper space can suck it in, but at the same time it can receive and screen most of the larger dust particles and grinding waste falling from above. This achieves the initial separation of large waste particles from fine dust, prevents large waste from entering the collection system below and causing blockage, and reduces the filtration load on the filter element in the dust collection assembly, which helps to extend the service life of the filter element. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the dry-type transformer coil polishing chamber used in this embodiment of the utility model; Figure 2 This is a schematic diagram of the internal structure of the dry-type transformer coil polishing chamber used in this embodiment of the utility model; Figure 3 This is a first-view schematic diagram of the internal structure of the dry-type transformer coil polishing chamber used in this embodiment of the utility model.
[0019] The above figures include the following reference numerals: 1. Grinding space; 2. Dust removal components; 3. Filter element; 4. Air inlet duct; 5. Fan; 6. Air outlet duct; 7. Bend; 8. Filter plate; 9. Guide plate; 10. Fixing plate; 11. Cleaning door; 12. Air blowing pipe; 13. Baffle plate; 14. Feeding track; 15. Connecting plate; 16. I-beam; 17. Limiting support plate. Detailed Implementation
[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0021] According to an embodiment of this utility model, a dry-type transformer coil polishing chamber is provided. Workers can choose to manually enter the polishing chamber for polishing or use automatic polishing equipment. Please refer to [link to details]. Figures 1 to 3 It includes: a grinding space 1 and a feed inlet connected to the grinding space 1; a dust removal component 2, which has a filter section and an air outlet section, the filter section is connected to the air outlet section, the air outlet section extends in a preset direction, and the air outlet section is located at the feed inlet of the grinding space 1; the air outlet section is used to generate airflow toward the interior of the grinding space 1 to form an air curtain to prevent dust from escaping from the feed inlet.
[0022] By adopting the above technical solution, by setting the exhaust of the dust removal component 2 at the feed inlet of the grinding space 1, a continuously flowing air curtain is generated. This air curtain can effectively block and blow back the dust particles that attempt to escape from the feed inlet during the grinding process into the interior of the grinding space 1, thereby physically isolating the main channel for dust to diffuse outward. This solution fundamentally solves the workshop pollution problem caused by open grinding, provides health protection for operators, and maintains the cleanliness of the external production environment.
[0023] Furthermore, multiple dust removal components 2 can be installed within the grinding space 1, and can be configured according to actual needs.
[0024] By adopting the above technical solution and setting up multiple sets of dust removal components 2, the components can be flexibly arranged in key locations where dust is prone to accumulate or disperse, according to the actual size of the grinding space 1 and the amount of dust generated. This modular and scalable design allows the grinding chamber to adapt to grinding operations of different scales and process requirements. By increasing local airflow control and purification points, more comprehensive and efficient control and collection of dust in the grinding space 1 can be achieved, significantly improving the dust prevention efficiency and adaptability of the entire system.
[0025] Please refer to Figure 2 The dust removal assembly 2 includes: a filter element 3, which is disposed within the grinding space 1; an air inlet duct 4, which is installed within the grinding space 1 and is connected to the filter element 3 to filter dust through the filter element 3; a fan 5, which is disposed on the air inlet duct 4 and is connected to the air inlet duct 4; and an air outlet duct 6, which extends in a preset direction and is connected to the air outlet end of the fan 5; wherein the fan 5 and the air outlet duct 6 form an air outlet section; and the filter element 3 and the air inlet duct 4 form a filtration section.
[0026] By adopting the above technical solution, a complete internal air circulation filtration system is formed by integrating and connecting the fan 5, the air inlet duct 4, the filter element 3, and the air outlet duct 6. The fan 5 provides power to draw dust-rich air from the grinding space 1 through the air inlet duct 4. When passing through the filter element 3, the dust is trapped and filtered, and the clean air is delivered to the air outlet duct 6 and blown out to form an air curtain. This solution realizes the continuous purification and recycling of the air inside the grinding space 1. It not only efficiently removes dust from the air, but also avoids the large amount of energy loss required to directly exhaust indoor air to the outside, achieving the effect of energy saving and environmental protection.
[0027] Please refer to Figure 2 The dust removal component 2 also includes a bend 7, one end of which is located at the air outlet of the air outlet duct 6, and the other end of which is located towards the grinding space 1.
[0028] By adopting the above technical solution, and by setting a bend 7 at the end of the air outlet duct 6, the direction of the final airflow can be flexibly adjusted. This allows the operator to precisely guide the air curtain to the area where dust needs to be blocked, such as directly targeting the center area of the coil or feed inlet, based on the specific location of the grinding operation and the dust dispersion situation. This solution enhances the targeting and effectiveness of the air curtain and further optimizes the accuracy and efficiency of dust control.
[0029] Furthermore, the bend 7 has an angle adjustment function.
[0030] Please refer to Figure 1 It also includes: a filter plate 8, which is disposed in the grinding space 1 and located below the dust removal assembly 2; the two sides of the filter plate 8 are respectively connected to the opposite side walls of the grinding space 1.
[0031] By adopting the above technical solution, and by setting the filter plate 8 below the dust removal component 2, the grinding space 1 is vertically divided into different functional areas. The filter plate 8 allows airflow to pass through so that the dust removal system in the upper space can suck it in, but at the same time it can receive and screen most of the larger dust particles and grinding waste falling from above. This achieves the initial separation of large waste particles from fine dust, prevents large waste from entering the collection system below and causing blockage, and reduces the filtration load of the filter element 3 in the dust removal component 2, which helps to extend the service life of the filter element 3.
[0032] Please refer to Figure 3 It also includes: a guide plate 9, which is inclined and located below the filter plate 8, for guiding dust to slide down.
[0033] By adopting the above technical solution, by setting an inclined guide plate 9 below the filter plate 8, a smooth guiding slope is provided for the falling dust and fine waste. Under the action of gravity, the dust accumulated on the guide plate 9 can automatically and centrally slide down to its lower end. This solution realizes the initial collection and directional transmission of dust, avoids the dust from spreading and accumulating at the bottom of the grinding space 1, creates extremely favorable conditions for subsequent centralized cleaning, and significantly reduces the difficulty of cleaning work.
[0034] Specifically, the bottom of the guide plate 9 and the grinding space 1 are provided with a preset angle, the angle of which is greater than or equal to 15° and less than or equal to 65°.
[0035] By adopting the above technical solution, and by controlling the tilt angle of the guide plate 9 within the above angle range, it is ensured that the dust can slide smoothly and smoothly under its own gravity, avoiding dust retention caused by too small an angle, and also preventing structural instability or space waste caused by too large an angle. This angle range is the best balance point to achieve the dust self-flow and collection effect, ensuring the reliability and efficiency of the guiding function.
[0036] Please refer to Figure 3 It also includes: a fixing plate 10, which is installed at the feed inlet of the grinding space 1 and is connected to the side of the filter plate 8 near the feed inlet; the fixing plate 10 is connected to the side of the guide plate 9 near the feed inlet to fix the filter plate 8 and the guide plate 9.
[0037] By adopting the above technical solution, by setting a fixing plate 10 and connecting it to the end of the filter plate 8 and the guide plate 9 near the feed inlet, additional and solid mounting points and boundary fixation are provided for these two key components. This greatly enhances the overall stability of the filter plate 8 and the guide plate 9, prevents loosening or deformation at their connection, and thus ensures the long-term reliable operation of the internal structure of the grinding chamber.
[0038] Please refer to Figure 1 It also includes: a cleaning port, which is located at the connection between the guide plate 9 and the bottom of the grinding space 1; a cleaning door 11 is provided at the cleaning port, which is rotatably arranged relative to the grinding space 1.
[0039] By adopting the above technical solution, a cleaning port with a cleaning door 11 is set at the end of the lowest point of the guide plate 9, providing a dedicated and sealed discharge channel for the collected dust. Operators can open the cleaning door 11 periodically to easily clean the dust collected here out of the grinding chamber. This solution achieves dust-free cleaning, avoids secondary pollution during the cleaning process, and makes maintenance work safe, convenient and efficient.
[0040] Please refer to Figure 1 It also includes an air blowing pipe 12, which passes through the grinding space 1. The air outlet of the air blowing pipe 12 is located above the end of the guide plate 9 near the fixed plate 10, so as to blow the dust on the guide plate 9 to the cleaning port by external high-pressure gas.
[0041] By adopting the above technical solution, by setting the air blowing pipe 12 and pointing its air outlet towards the high area of the guide plate 9, the residual dust on the guide plate 9 that failed to slide off automatically due to static electricity or slight adhesion can be thoroughly blown to the low cleaning port by intermittent or continuous high-pressure airflow. As an active cleaning method, this solution compensates for the shortcomings of simply relying on gravity to slide off, ensures the complete cleanliness of the surface of the guide plate 9, and further improves the efficiency of dust collection.
[0042] Please refer to Figure 1 It also includes a wind baffle 13, which is installed at the feed inlet and spaced apart from the bend 7.
[0043] By adopting the above technical solution, by setting a baffle plate 13 at the feed inlet that is spaced apart from the bend 7, a more complex airflow field can be formed together with the air curtain. The baffle plate 13 can physically block and turbulent the dust airflow that is trying to escape, reduce its kinetic energy, and work together with the air curtain to form multiple protections. This solution further enhances the sealing effect at the feed inlet, and can effectively suppress dust escape that may be caused by external environmental airflow disturbance.
[0044] Please refer to Figure 3 It also includes two feed rails 14 and a connecting plate 15. The two feed rails 14 are spaced apart along the width direction of the grinding space 1 and are connected by the connecting plate 15.
[0045] By adopting the above technical solution, a stable track frame is formed by setting two spaced feeding tracks 14 and rigidly connecting them with connecting plates 15. This frame can support and guide the heavy dry-type transformer coil to smoothly enter and move out of the grinding space 1. This solution realizes the track-based and standardized handling of the coil, avoids the instability of dragging directly on the ground or using lifting tools, greatly reduces the labor intensity and safety hazards of loading and unloading operations, and protects the surface of the coil from accidental bumps.
[0046] Specifically, the feed track 14 includes: an I-beam 16 extending along the length of the grinding space 1; and two limiting support plates 17 connected to both sides of the I-beam 16 respectively.
[0047] By adopting the above technical solution, using I-beam 16 as the main body of the track, which has extremely high strength and bending modulus, it can withstand the heavy load of the coil without deformation. The limiting support plates 17 installed on both sides of the I-beam 16 form a guide groove, which can effectively limit the lateral movement of the rollers of the transport trolley or coil pallet, preventing them from deviating or derailing during travel. The combined effect of this solution ensures the smooth, accurate and safe movement of the coil throughout the feeding process.
[0048] Working principle: The operator first smoothly feeds the dry-type transformer coil to be ground into the grinding space 1 through the track system consisting of the feed track 14 and the connecting plate 15. At this time, the dust removal component 2 set at the feed inlet automatically starts, and the fan 5 inside draws the dust-laden air in the grinding space into the air inlet duct 4. After being efficiently filtered by the filter element 3, the clean air is forced into the air outlet duct 6 extending in a preset direction, and finally forms a continuously flowing air curtain through the adjustable angle bend 7. This air curtain works in conjunction with the baffle plate 13 to effectively prevent dust from escaping from the feed inlet. In the closed grinding space, most of the heavier particles generated during grinding are absorbed. The debris is intercepted and initially screened by the filter plate 8 above, while the diffused fine dust is continuously drawn and purified by the negative pressure airflow formed by the dust removal components. The debris falling on the filter plate 8 and the dust penetrating the filter plate eventually fall onto the inclined guide plate 9 and automatically gather towards the cleaning port under the action of gravity. For a small amount of residual dust, high-pressure gas can be introduced through the air blowing pipe 12 to blow it to the vicinity of the cleaning port. By periodically opening the cleaning door 11 at the cleaning port, all the dust and waste materials gathered here can be safely and centrally cleaned out of the grinding chamber, thus realizing the closed-loop management of the entire process of dust generation, control, collection and cleaning.
[0049] It should be noted that the model of the fan 5 in this application is not limited in too much. Electrical components can be selected as needed according to the actual situation. The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0050] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.
[0051] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0052] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0053] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.
Claims
1. A dry-type transformer coil polishing chamber, characterized in that, include: Grinding space (1) and feed inlet communicating with said grinding space (1); The dust removal assembly (2) has a filter section and an air outlet section. The filter section is connected to the air outlet section. The air outlet section extends along a preset direction and is located at the feed inlet of the grinding space (1). The air outlet section is used to generate airflow toward the interior of the grinding space (1) to form an air curtain to prevent dust from escaping from the feed inlet.
2. The dry-type transformer coil polishing chamber according to claim 1, characterized in that, The dust removal component (2) includes: Filter element (3), the filter element (3) is disposed in the polishing space (1); An air inlet duct (4) is installed in the grinding space (1). The air inlet duct (4) is connected to the filter element (3) so as to filter the dust through the filter element (3). A fan (5) is installed on the air inlet duct (4), and the air inlet end of the fan (5) is connected to the air inlet duct (4); Air outlet duct (6), the air outlet duct (6) extends in a preset direction, and the air inlet end of the air outlet duct (6) is connected to the air outlet end of the fan (5); The fan (5) and the air outlet duct (6) form the air outlet section; the filter element (3) and the air inlet duct (4) form the filter section.
3. The dry-type transformer coil polishing chamber according to claim 2, characterized in that, The dust removal assembly (2) also includes: The bent pipe (7) has one end located at the air outlet of the air outlet duct (6) and the other end located towards the grinding space (1).
4. The dry-type transformer coil polishing chamber according to claim 1, characterized in that, Also includes: The filter plate (8) is disposed in the grinding space (1) and is located below the dust removal assembly (2); the two sides of the filter plate (8) are respectively connected to the opposite sidewalls of the grinding space (1).
5. The dry-type transformer coil polishing chamber according to claim 4, characterized in that, Also includes: The guide plate (9) is inclined and located below the filter plate (8) to guide the dust to slide down.
6. The dry-type transformer coil polishing chamber according to claim 5, characterized in that, Also includes: A fixing plate (10) is installed at the feed inlet of the grinding space (1). The fixing plate (10) is connected to the filter plate (8) on the side near the feed inlet. The fixing plate (10) is also connected to the guide plate (9) on the side near the feed inlet to fix the filter plate (8) and the guide plate (9).
7. The dry-type transformer coil polishing chamber according to claim 6, characterized in that, Also includes: A cleaning port is provided at the bottom connection between the guide plate (9) and the grinding space (1); a cleaning door (11) is provided at the cleaning port, and the cleaning door (11) is rotatably provided relative to the grinding space (1).
8. The dry-type transformer coil polishing chamber according to claim 7, characterized in that, It also includes an air blowing pipe (12) that passes through the grinding space (1). The air outlet of the air blowing pipe (12) is located above the guide plate (9) near the fixed plate (10) so that the dust on the guide plate (9) can be blown to the cleaning port by external high-pressure gas.
9. The dry-type transformer coil polishing chamber according to claim 3, characterized in that, It also includes a baffle plate (13), which is disposed at the feed inlet and is spaced apart from the bend (7).
10. The dry-type transformer coil polishing chamber according to claim 1, characterized in that, It also includes two feed rails (14) and a connecting plate (15). The two feed rails (14) are spaced apart along the width direction of the grinding space (1), and the two feed rails (14) are connected by the connecting plate (15).